Siemens USB/MPI+ PLC Programming Cable is optically isolated and the direct replacement for Siemens PLC S7-300, S7-400 programming cable PC/MPI. This cable comes with true RS232 to USB conversion that is embedded within the cable, not just a RS232 to USB converter. This cable contains all the necessary data conversion equipments to communicate between Siemens S7-300, S7-400 series PLC and PC.It supports Windows2000 and Windows XP (WinNT4/95/98/Me/DOS NOT SUPPORTED).